عنوان مجله
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JOURNAL OF ALLOYS AND COMPOUNDS
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چکیده
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The novel ternary Fe3N/Fe2O3/C3N4 photocatalyst was prepared by thermal pyrolysis of potassium
ferricyanide in melamine. The structural, morphological and physico-chemical properties of the photocatalyst were characterized by a multi-technique approach. Photocatalytic experiments supported that
0.04 g of the photocatalyst was able to totally remove 5 ppm of rhodamine B (RhB) solution under acidic
condition with the rate constant of 0.1 min1 in less than 30 min. According to spin-trapping ESR
analysis,
OH radicals play a key role in the RhB photodegradation implying Z-scheme mechanism is
applicable to our system. Moreover, the evolution rate of CO and CH4 over the photocatalyst was 8.03 and
1.6 mmol g1 h1
, respectively, which was much higher than the reference photocatalysts under the same
conditions. The enhanced photocatalytic performance of this system is attributed to the unique ternary
heterojunction between the interfaces of g-C3N4, Fe3N and Fe2O3, which effectively suppressed the
charge carriers recombination.
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